Product - Process pH Measurement – pHD Product Family

pHD Differential Process pH Sensor  

pHD Sensor

Unprecedented Accuracy

Exceptional Performance with the Differential Electrode Measurement Technology

Lower Maintenance Needs with the Double Junction Salt Bridge

Reliability with the Built-in Encapsulated Preamp

Extended Working Life with the Replaceable Salt Bridge/Protector

Feature and Benefits - for additional assistance call 1(800) 227-4224  

Diagram Differential Technology

See How the pHD Sensor Works!

Features & Benefits:

Exceptional Performance with the Differential Technology + | -

Lower Maintenance Needs with the Double Junction Salt Bridge + | -

Reliability with the Built-in Encapsulated Preamp + | -

Extended Working Life with the Replaceable Salt Bridge/Protector + | -

"Plug and Play" to Hach sc Controllers + | -

Durable Body Materials + | -

Versatile Mounting Styles + | -

Differential Sensor Warranty + | -

1" in Diameter

Digital or Analog Communications

Low Profile Electrodes

Featured Products  

>> Use Hach’s process pH sensor selection guides to find the right digital or analog pHD sensor for your job

Name Digital Part # Analog Part # Image Typical Industry Common Uses Mounting Hardware
pHD-General Purpose DPD1P1 PD1P1 Hach pHD Online Process pH Sensor - General Purpose pH Sensor

Drinking Water
Waste Water
Industrial Waste Water
General Purpose Sensor
Preferred for Waste Water
Convertible
pHD-Clean Water DPD1R1 PD1R1 Hach pHD sc Online Process pH Sensor - pH Sensor for HF Resistance, Low pH
Drinking Water
Food*
Beverage*
Clean Water
Preferred for Drinking Water
Convertible
pHD-Insertion Mount DPD2P1 PD2P1 Hach pHD sc Online Process pH Sensor - General Purpose pH Sensor

Drinking Water
Waste Water
Industrial Waste Water
Direct Pipe Mounting 1.5"
Diameter or Greater
Insertion
pHD-Stainless Steel DPS1  N/A Hach pHD sc Online Process pH Sensor - General Purpose Stainless Steel pH Sensor
Drinking Water
Waste Water
Industrial
Heavier Sensor for
Negative Buoyancy

Use when Pole Mounting
is impossible
Immersion
Chain Mount
pHD-HF Resistant DPD1P3 PD1P3 Hach pHD sc Online Process pH Sensor - General Purpose Sanitary Mount pH Sensor

Semiconductor
Petroleum Industry
HF Acid Process
Low HF Concentration
Convertible
pHD - Sanitary DPD3P1 PD3P1 Hach pHD sc Online Process pH Sensor - General Purpose Sanitary Mount pH Sensor

Food, Dairy*
Beverage*
Pharmaceuticals*
General Purpose in
Sanitary Environment
Sanitary
 * Not certified for direct contact applications

» Browse all pH/ORP online sensors

Process pH Menu  

Patented Technology  

The former GLI, now a Hach Company brand, invented the Differential Electrode Technique for pH measurement.